clock reset ISUZU AXIOM 2002 Service Repair Manual

1A±92
HEATING, VENTILATION AND AIR CONDITIONING (HVAC)
StepActionValue(s)Ye sNo
11. Allow the engine to idle until it completely warms up.
2. Turn the starter switch to the OFF position.
3. Place a 60±watt lamp approximately 15 cm from the
sun sensor.
NOTE: This procedure is best performed at night or in
a dark, unlit area.
Is the action complete?
ÐGo to Step 2Ð
2Simultaneously press and hold the RESET key and the
CLOCK key (display unit).
Move the starter switch to start the engine.
Does DIAG appear on the display?
ÐGo to Step 3
Replace
display unit
3Press the COMPUTER MODE key.
Does DIAG AIRCON appear on the display?
ÐGo to Step 4
Replace
audio unit
4NOTE: A '1' should appear in the set temperature
segment of the display.
Does '0' appear in the outside air segment of the
display?
ÐGo to Step 6Go to Step 5
5Repair or replace damaged parts.
NOTE: Refer to
Step 1 Trouble Code Table.
Is the action complete?ÐGo to Step 1Ð
6Press and release the  fan switch (one time only).
NOTE: A '2' should appear in the set temperature
segment of the display.
Does '0' appear in the outside air segment of the
display?
ÐGo to Step 8Go to Step 7
7Repair or replace damaged parts.
NOTE: Refer to
Step 2 Trouble Code Table.
Is the action complete?ÐGo to Step 1Ð
8Press and release the  fan switch (one time only).
NOTE:

Refer to
Step 3 Sensor Output Check for a sample
output value.

A '3' should appear in the set temperature
segment of the display.
Does the correct sensor output value appear in the
outside air segment of the display?
ÐGo to Step 10Go to Step 9
9Repair or replace damaged parts.
NOTE: Refer to
Trouble Spot Inspection.
Is the action complete?ÐGo to Step 1Ð
10Press and release the  fan switch one time only.
NOTE: Refer to
Step 4 (Operation Check) for display
readings and inspection steps.
Are all parts operating normally?
ÐGo to Step 12Go to Step 11

6E±495
6VE1 3.5L ENGINE DRIVEABILITY AND EMISSIONS
Diagnostic Trouble Code (DTC) P1625 PCM Unexpected Reset
Circuit Description
The powertrain control module (PCM) monitors
unexpected PCM reset. This will not turn on MIL light on,
only record code DTC P1625.
Conditions for Setting the DTC

Clock or COP (Computer Operating Properly) reset.
Action Taken When the DTC Sets

The PCM will not illuminate the malfunction indicator
lamp (MIL).

The PCM will store conditions which were present
when the DTC was set as Failure Records only. This
information will not be stored as Freeze Frame data.
Conditions for Clearing the MIL/DTC

The PCM will turn the MIL ªOFFº on the third
consecutive trip cycle during which the diagnostic has
been run and the fault condition is no longer present.

A history DTC P1625 will clear after 40 consecutive
warm-up cycles have occurred without a fault.

DTC P1625 can be cleared by using the Tech 2 ªClear
Infoº function or by disconnecting the PCM battery
feed.
Diagnostic Aids
Check for the following conditions:

P1625 stored alone does not need diagnosis. Clear
DTC code.
DTC P1625 ± PCM Unexpected Reset

StepActionValue(s)Ye sNo
1Was the ªOn-Board Diagnostic (OBD) System Checkº
performed?
ÐGo to Step 2
Go to OBD
System
Check
21. Ignition is ªONº.
2. Install the Tech 2.
3. Start the engine and let it Idle.
4. On the Tech 2, select ªDTC infoº.
Does the Tech 2 indicate DTC P1625 failed?
ÐGo to Step 3
Go to
Diagnostic
Aids
31. Ignition is ªONº.
2. Clear DTC P1625 by using the Tech 2 ªClear Infoº.
3. Start the engine and let it Idle.
4. On the Tech 2, select ªDTC infoº.
Does the Tech 2 indicate DTC P1625 failed?
ÐGo to Step 4
Go to
Diagnostic
Aids
41. Check for aftermarket electronics, such as
transceiver, stereos, and anti theft devices. They
may radiate EMI into the control system if they are
improperly installed. (This may cause a false sensor
reading and turn on the MIL.)
2. If a problem is found, repair as necessary.
Was a problem found?
ÐVerify repairÐ

ENTERTAINMENT8C±15
Audio Self-Diagnosis
StepActionValue(s)Ye sNo
11. Simultaneously press and hold the RESET key and
the CLOCK key (on the display panel).
2. Turn the ignition switch to the ON position.
Does DIAG appear on the display screen?
ÐGo to Step 2
Check power
supply and
component
connections.
Start
self-diagnosis
again.
2Press and release the SERVICE key (1 time only).
Does DIAG AUDIO appear on the display?
ÐGo to Step 3Go to Step 11
3Press and release the SERVICE key (1 time only) to
check tape connections.
Does TAPE OK appear on the display?
ÐGo to Step 4
On NG display,
Go to
Step 11
4Press and release the SERVICE key (1 time only) to
check CD changer connections.
Does CD CHG OK appear on the display?
ÐGo to Step 5
On NG display,
Go to
Step 11
5Press and release the SERVICE key (1 time only) to
check communication with A/C unit.
Does A/C DATA OK appear on the display?
ÐGo to Step 9
On NG display,
Go to
Step 6
6Is A/C DATA ERR1(abnormal display data line)
displayed?
Ð
Refer to A/C
self-diagnosis
Go to Step 7
7Is A/C DATA ERR2 (abnormal CLOCK data line)
displayed?
Ð
Refer to A/C
self-diagnosis
Go to Step 8
8Is A/C DATA ER3 (abnormal SW data line) displayed?ÐGo to Step 11Ð
9Press and release the SERVICE key (1 time only) to
display the A/C unit error history.
Is the action complete?
ÐGo to Step 10Ð
101. Press and release the SERVICE key (1 time only) to
change to the key diagnosis mode.
2. Press and release each key.
NOTE: As a key is pressed, its name should appear on
the display. The A/C LED should blink at 1±second
intervals.
Did the events described in Step 2 occur?
ÐGo to Step 12Go to Step 11
11Replace the audio unit.
Is the action complete?
ÐGo to Step 1Ð
12Press and release the ON/OFF key.
Is the action complete?
ÐGo to Step 1Go to Step 13
13Press and release the SERVICE key (1 time only).
Is the action complete?
ÐGo to Step 3Ð

8C±16ENTERTAINMENT
Display Self-Diagnosis
StepActionValue(s)Ye sNo
11. Simultaneously press and hold the RESET key and
the CLOCK key (on the display panel).
2. Turn the ignition switch to the ON position.
Does DIAG appear on the display screen?
ÐGo to Step 2
Check power
supply and
component
connections.
Start
self-diagnosis
again.
2Press and release the RESET key (1 time only).
Does DIAG DISP appear on the display?
ÐGo to Step 3Go to Step 10
3Press and release the RESET key (1 time only) to start
audio communications diagnosis.
Does AUD DAT OK appear on the display?
ÐGo to Step 5
On NG display,
Go to
Step 4
4Replace the audio unit.
Is the action complete?
ÐGo to Step 1Ð
51. Press and release the RESET key (1 time only).
2. Confirm that the trouble history is displayed on the
screen.
Is the trouble history displayed?
ÐGo to Step 6Ð
6Press and release the RESET key (1 time only) to start
MID communications diagnosis.
Does MID DATA OK appear on the display?
ÐGo to Step 8
On NG display,
Go to
Step 7
7Replace the MID unit.
Is the action complete?
ÐGo to Step 1Ð
81. Press and release the RESET key (1 time only) to
display MID communications error history.
2. Confirm that the error history is displayed on the
screen.
Is the error history displayed?
ÐGo to Step 9Ð
9Press and release the RESET key (1 time only) to open
all segments.
Do all segments light?
ÐGo to Step 11Go to Step 10
10Replace the display unit.
Is the action complete?
ÐGo to Step 1Ð
11Press and release the ON/OFF key to complete display
self-diagnosis.
Is the action complete?
ÐGo to Step 1Go to Step 12
12Press and release the SERVICE key.
Is the action complete?
ÐGo to Step 3Ð

ENTERTAINMENT8C±17
MID Self-Diagnosis
StepActionValue(s)Ye sNo
11. Simultaneously press and hold the RESET key and
the CLOCK key (on the display panel).
2. Turn the ignition switch to the ON position.
Does DIAG appear on the display screen?
ÐGo to Step 2
Check power
supply and
components
connections.
Start
self-diagnosis
again.
2Press and release the CLOCK key (1 time only).
Does DIAG MID appear on the display?
ÐGo to Step 3Ð
3Press and release the CLOCK key (1 time only) to
begin GPS communications diagnosis.
Does GPS OK appear on the display?
ÐGo to Step 5
On ERROR1,
Go to
Step 4
4Repair open circuit between MID and GPS receiver
(I-13±2 ~ I-16±5).
Is the action complete?
ÐGo to Step 1Ð
5Press and release the CLOCK key (1 time only) to
begin fuel injection pulse diagnosis.
Does F-INJ OK appear on the display?
ÐGo to Step 7
On ERROR2,
Go to
Step 6
6Repair open fuel injection pulse circuit (I-13±5 ~
E35±8).
Is the action complete?
ÐGo to Step 1Ð
7Press and release the CLOCK key (1 time only) to
begin fuel remainder pulse diagnosis.
Does F-SENS OK appear on the display?
ÐGo to Step 9
On ERROR3,
Go to
Step 9
8Repair open fuel remainder pulse circuit (I-13±6 ~
E35±48).
Is the action complete?
ÐGo to Step 1Ð
9Press and release the CLOCK key (1 time only) to
begin gyro-sensor diagnosis.
Does GYRO OK appear on the display?
ÐGo to Step 11
On ERROR4,
Go to
Step 10
10Replace the MID control unit.
Is the action complete?
ÐGo to Step 1Ð
111. Press and release the CLOCK key (1 time only) to
begin vehicle speed sensor diagnosis.
2. Drive vehicle.
Does SPEED OK appear on the display?
ÐGo to Step 13
On ERROR5,
Go to
Step 12
12Repair open vehicle speed sensor circuit (I-13±15 ~
E43±3).
Is the action complete?
ÐGo to Step 1Ð
13Press and release ON/OFF key to return to start of
diagnosis screen.
Is the action complete?
ÐGo to Step 1Go to Step 14
14Press and release the SERVICE key.
Is the action complete?
ÐGo to Step 2Ð